The 2020 SDK is completely different from X-PLANE and will be a model from scratch. If IXEG was for p3d, you might think. Rather, it is the x-PLANE 12 version. Now another developer is developing a full line of 737 classics for 2020 and p3d. Probably the best and most realistic 737CL in XP, better than the near default 737 in 2020